Loader



NOV- 3, 1942- T. WERTHMAN ErAL yLOADER Filed March s, 1941 5 sheets-sheet 1 ..4 TTORNEYS.

N0V- 3 1942 T. WERTHMAN Erm. 2,301,102

LOADER Filed March 3, 1941 5 Sheets-Sheet 5 IN VEN TORS A TTORNEYS'.

Nov. 3, 1942,

T. WERTHMAN ETA?.

' LOADER Filed March s, 1941 5 Sheets-Sheet 4 J2 3/ 1'.' werf/l 7110077 R. A Ca J we//,

' INVENTOM A TTORNEYS.

NOV- 3, 1942- T. WERTHMAN Erm.

LOADER VFiled March 3, 1941 5 Sheets-Sheet 5 27a/Numan A TTORNEYS".

Patented Nov. 3, 1942 T OFFICE LOADER Theodore Werthman and Richard vAndrew well, Cherokee. Iowa Application March 3, 1941, Sel'litl No. 381,507

8Claims.

The device forming the subject matter of this application is a loader of that sort in which a scoop-carrying frame is mounted for swinging movement on a' vehicle, the frame being swung upwardly to elevate the scoop and its load, and the scoop being released, to tilt and discharge its load.

Among the objects of the invention are the following: the provision of novel means for imparting vertical swinging movement to the scoopcarrying frame: such a disposition of the flexible elements which impart swinging movement to the frame, that the nexible elements will serve as eiiective, divergins Buys for the cylinder and piston mechanism which constitutes a portion of the means for raising and lowering the scoop-carrying-4 frame: the provision of novel means for guiding the scoop frame in its upward and downward swinging movement: and the provision of novel means for holding the scoop in working position, and for releasing the scoop to discharge its contents. f

The invention aims further, to supply a device of the class described in which gears, winding drums. brakes, clutches, sprocket chains and the like will be unnecessary. 'I'he machine will operate in low head room, and it can be us'ed in sheds, under trees, and in other places where head room is limited. The number of parts which an operator must manipulate are reduced. 'I'he device may be assembled easily with and removed from a tractor, and the nconstruction is such that the weight carried by the tractor is reduced.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the above and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings:

Pig. l shows. in side elevation, a device constructed in accordance with the invention, parts being broken away, and parts appearing in sec- Fig. 4 is a fragmental, vertical, longitudinal section, taken on the line 4-4 of Fig. 3;

Fig. 5 is a horizontal section, on the line 5 8 of Pls. 4:

Fig. 6 is a sectional view, similar to Fig. 4, but showing the scoop in a diilerent position with respect to the surface of the soil;

Fig. 'I is a perspective view showing the cross bar of the scoop-carrying frame and parts which are mounted on it, especially the rock shaft, the

latch shaft and associated elements;

Fig. 8 is a perspective view showing the rock shaft and the latch shaft in spaced relation;

Fig. 9 is a perspective view showing the lever l5 segment, and the means for mounting the lever segment and the scoop-carrying frame on the rear axle housing of a tractor.

The drawings disclose a motor-propelled. wheel-mounted vehicle of the tractor type, desighated generally by the letter V and presenting no patentably characteristic features. The vehicle partsvgermane to the invention hereinafter described are a main frame I, a rear axle housing 2 and an operators seat 3.

In carrying out the invention, there is provided a carrying frame nembodying side rails l and a forward cross bar ,5. The cross bar 5 is an upwardly-opening channel, as Fig. 'L shows, the ends of the cross bar being connected to the side rails 4 by means of brackets t. The carrying frame F is adapted to be swung vertically at the will of an operator, the rear ends of the side rails 4 being pivoted at 1 to yoke blocks 8, secured by U-bolts 9 to the rear axle housing 2 of the vehicle V. In the upper end of one of the yoke blocks 8 (Fig. 9), a sheave I0 is journaled, and the said yoke block carries a forwardly-extended segment I I.

An approximately V-shaped extension I2 is se- 40 cured to the forward portion of the main vehicle frame I, and may be regarded as a part thereof. Depending hangers I4 are secured to the frame extension i 2 and carry a pivot element I5, whereon the lower end of a uid pressure cylinder I6 is mounted, the construction being such that the cylinder has small swinging movement, longitudinally of the vehicle V. The actuating fluid delivered to the cylinder I6 may be oil; supplied through a conduit," (Figs. l and 4), assembled with the lower portion of the cylinder and with a pressure pump (not shown) located within the engine hood I8 of the vehicle V. I

'I'he piston structure which reciprocates in the cylinder II is indicated sufficiently by a piston rod It, to the upper end of which a erom head is secured, pulleys 2l being rotatably mounted on the cross head and being located on opposite sides of the piston rod. In order to sustain the cylinder and piston structure substantially in the position shown in the drawings, and to prevent a possible rearward bending of the piston rod I9 under the weight that is imposed upon it by the carrying frame` F and associated parts (Fig. 1), the forward end of a brace 22 is pivoted at 23 to the upper end of the piston rod, the rear 1 end of the brace being pivoted at 24 to an arch 25 rigidly mounted on the vehicle frame I.

Flexible elements 26 are provided and have their forward ends secured at 21 to the forward ends of the side rails 4 of the carrying frame F. The flexible elements 26 are looped over the pulleys 2l on the cross head 2D of the piston rod 19, the pulleys having a rearward convergence in top plan (Fig. 2), to the end that `the rear portions of the flexible elements may be crossed conveniently behind the piston rod, and close to the pulleys, as indicated at 26 in Fig. 3, The rear ends of the exible elements 26 are anchored at 28 on the extension l2 of the vehicle frame Il. Referring to Fig. 2, it will be noted that the aforesaid disposition of the flexible elements 26 results in a construction wherein the cylinder and piston structure l6-I 9 receives the sustaining benefit of what amounts to four downwardly-diverging guys.

As shown to best advantage in Figs. 1, 2 and 5, a scoop 3|) is provided, the word scoop being construed to mean any appliance suitable for handling the particular material upon which the machine is to work. The scoop 30 is pivotally mounted at 3l, for vertical swinging movement,

between brackets 32 which project forwardly from the side rails 4 of the carrying frame F. The rear wall of the scoop 38 is supplied with rearwardly converging arms 33, strengthened by a brace 34, and connected near their rear ends by a keeper pin 35 (Fig. 3).

Bearing posts 36 are mounted in the cross bar 5 of the carrying frame F, and in them a rock shaft 31 is journaled. Rocking movement is imparted to the shaft 31 by an upstanding arm 36 which it carries, the forward end of a link 39 being pivoted at 40 to the arm, the rear end of the link being pivoted at 4l to a lever 42, which is fulcrumed at 43 on the segment Il and provided with a latch mechanism 44 adapted to cooperate with the segment. The lever 42 is conveniently accessible from the operators seat 3.

Reverting to Fig. '1, the rock shaft 31 has fixed, forwardly-extended arms 45, in which a latch shaft 46 is mounted to rock. At its inner end, the shaft 46 carries an upstanding latch 41, bevelled at 48 for initial engagement with the keeper pin 35 on the arms 33 of the scoop 3m, and provided with a seat 49 for the reception of the keeper pin. The latch shaft 46 is supplied with a rearwardly-extended, angular stop 58, so located as to engage beneath one of the arms 45 on the rock shaft 31.

f Intermediate its ends (Figs. 7 and 8), the latch shaft 46 is equipped with a depending finger 5|,

a retractile spring 52 being connected to the linger and anchored on the rock shaft 31. The end of the latch shaft 46 which is remote from the latch 41 has an upstanding arm 53, Whereunto is connected a flexible operating member 54, extended backwardly through a fairleader 55 on one side rail 4 of the frame F (Fig. 3), and beneath the sheave I0 on the axle housing 2, to a cleat 56 (Fig. 2) on the arch 25, near the operator's seat 3.

An upright, arcuate, trough-shaped guide 51 (Figs. 4 and 3) is secured to the cross bar 5 of the frame F, and in the guide, an arcuate track 58 is slidablyreceived, the track being mounted on the extension l2 of the main vehicle frame l. The

` guide 51 and the track 58 cooperate to `hold the carrier frame F against `lateral swinging movement, and take much strain off the frame pivots shown at 1 in Fig. 1.

A Downward swinging movement of the frame F is limited by a chain or other suitable means 59 (Figs. 1 and 3), Asecured at its upper end to the track 58, and secured at its lower end to a'n offset 60 on one of the arms 33 of the scoop 30,`a proper space (Fig. l) being maintained between the bottom of the scoop and the surface on which the machine is operated. It is possible, as hereinafter explained, for an operator to tilt the scoop 30 on its pivotal mounting 3|, thereby to regulate the distance between the working edge of the scoop and the ground. When the scoop 30 comes into contact with the material to be raised, the scoop isswung to the latched position of Fig. 6.

The gross operation of a machine of the kind shown in this application is well known and need not be gone into. The raising and lowering of the scoop frameF is accomplished by means of the cylinder i6 and the piston rod I9, together with the chains 26, a governed supply of pressure fluid', preferably oil, being admitted to the cylinder I6, by way of the conduit l1.

When the latch 41 of Figs. 6, 7 and 8 is engaged with the scoop keeper 35 which is connected at 33 with the scoop 30, the frame F and the scoop 30, at a fixed angle to each other, can be raised and lowered with the pivot elements 1 of Fig. l as an axis of swinging movement.

The angle between the scoop 39 and the scoop frame 4, and consequently the angle between the bottom of the scoop and the soil'can be changed, as shown in Figs. 4 and 6, at the will` of an operator. Theiadjustment last referred to is accomplished through a train of parts including the hand leve 42 and the link 39Y of Fig. 1, and the arm 38 a the rock shaft 31 of Fig. '1. When the shaft 31 is rocked, the arms 45, the latch shaft 46, the latch 41 (interengaged withvthe keeper 35), and the arms 33 of the scoop 30, swing the scoop upwardly -and downwardly, with respect to the surface of the soil, on the pivot elements indicated at 3l in Fig. 1.

The releasing of the scoop 30, for movement about the pivot elements 3|, to assume a dumping position, is brought about by a'train of parts including the flexible element 54 of Fig. 1, the arm 53 of Fig. '1, the shaft 46, and the latch 41, the seat 49 of the latch being released from the keeper 35 which is carried by the scoop.

The purpose of the spring 52 of .Fig. '1 is to restore the latch 41 to the upright position shown in that figure, so that the keeper 35 which is carried by the scoop 30 can engage the beveled end 48 of the latch, tilt the latch and engage in the seat 49. The stop 50, engaging beneath the corresponding arm 45, checks the latch 41,

responsive to the pull of the spring 52, in the Fig. 1, it does so without jar, since the actuating fluid can be eased out of the cylinder I8, by way of the conduit i1.

What is claimed is:

l. In a loader of the class described, -a vehicle, a frame mounted to swing verticallyon the vehicle, a scoop carried by the frame; lifting mechanism comprising as constituent parts, a fluid pressure cylinder and a piston structure mounted to reciprocate therein, one of said constituent parts being pivotally assembled with the vehicle, a substantially horizontal brace having its forward portion pivotally connected to the other of said constituent parts, means for carrying the rear portion ofv the brace for vertical swinging movement on the frame, and a flexible element terminally connected to the vehicle and to the frame, the flexible element being slidablydengaged intermediate itsgends with said other of the constituent parts of the lifting mechanism.

2. In a loader of the class described, a vehicle, a frame mounted to swing vertically on the vehicle, a scoop carried by the frame, a uid pressure cylinder carried by the vehicle and located practically in the median longitudinal plane of the frame, a piston structure mounted tov reciprocate in the cylinder, flexible elements slidably assembled with the piston structure and means for connecting each flexible element to the vehicle and to the frame, at opposite sides of the vehicle and the frame, the flexible elements being crossed, to maintain them slidably assembled with the piston structure, and to cause them to furnish a four-way guy reinforcement for the piston structure. f

3. In a loader of the class described, a vehicle, a frame, means for mounting the frame to swing vertically on the vehicle, a scoop carriedv by the frame, means for raising and loweringthe frame, and upright, slidably interengaged members fixed respectively to the frame and to the vehicle and cooperating to limit lateral movement of the frame, the interengaged members being curved on radii having their origin at said means, said member of the frame being spaced from the corresponding member of the vehicle, longitudinally ofthe vehicle, to prevent scoop-thrust from being carried backwardly into said corresponding member of the vehicle.

4. A loader of the class described, constructed as 'set forth in claim 3, and wherein the interengaged members comprise a track on the vehicle and a channel shaped guide on the frame and receiving the track, the length of the guide being much less than the length of the track.

5. A loa'der of the class described, a vehicle, a frame mounted for vertical swinging movement on the vehicle, a scoop mounted on the frame for vertical swinging movement,` a keeper carried by the scoop, a rock shaft supported on the frame, a latch shaft disposed approximately parallel to the rock shaft, means for supporting the latch .shaft from the rock shaft, a latch on the latch shaft and engageable with the keeper, to hold the scoop against dumping, means for operating-the rock shaft to change the angle between the scoop and the frame, and means for operating the latch shaft independently of the rock shaft, to release the latch from the keeper and to permit the scoop to dump.

v6. A loader of the class described, a vehicle, a frame mounted for vertical swinging movement on the vehicle, a scoop mounted on the frame for vertical swinging movement, a keeper carried by the scoop, arms fixed on the rock shaft, a latch shaft journaled on the arms, a latch on the latch shaft and engageable with the keeper, to hold the scoop against dumping, spring means connected to the rock shaft and to the latch shaft for rotating the latch shaft to position the latch for engagement with the keeper, a stop on the latch shaft and engageable with one of the arms to maintain the latch in keeper-engaging position, against the action of the .spring means, means for operating the, rock shaft to change the angle between the scoop and the frame, and means for operating the latch shaft, to release the latch from the keeper and to permit the scoop to dump.

7. A loader of the class described, a vehicle, a frame mounted to swing vertically on the vehicle, a scoop mounted to swingvertically on the frame, a keeper carried by the scoop, a rock shaft journaled on the frame, a latch shaft, a latch on the latch shaft and engageable with the keeper to hold the scoop against dumping, journaling means supporting the latch shaft from the rock shaft, spring means carried by the shafts for rocking the latch shaft to dispose the latch in keeper-engaging position, and a stop on the latch shaft and engageable with a portion of the journaling means, to maintain the latch in keeperengaging position, against the action of the spring means, means for operating the rock shaft to change the angle between the scoop and the frame, and means for disengaging the latch from the keeper, to permit the/scoop to dump.

8. In a loader of the class described, avehicle, a frame mounted to swing vertically on lthe vehicle, a scoop carried by the frame, a fluid pressure cylinder carried by the vehicle and located practically in the median longitudinal plane of the frame, a piston structure mounted to reciprocate in the cylinder, rearwardly converging pulleys carried by the piston structure, flexible elements looped over the pulleys, and means for connecting each flexible element to the vehicle and to the frame, at opposite sides of the vehicle and the frame, the nexible elements being crossed, tomaintain them slidably assembled with the pulleys, and to cause them to furnish a four-way ,Buy reinforcement for the piston structure.

THEoDoRE WERTHMAN.' RICHARD ANDREW cAswELL. 

